TABLE 4.
Results of culture on SKDM agar, nested RT PCR of RNA extracts, and PCR of DNA extracts from kidney tissue from samples of commercially raised, sea cage Atlantic salmon
| No. of fish sampled | Assay results ofa:
|
||
|---|---|---|---|
| Culture | Nested RT PCR | PCR | |
| Untreated | |||
| 8 | +b | + | + |
| 3 | +c | − | + |
| 2 | − | + (weak) | + |
| 3 | − | − | + |
| Prior antibiotic chemotherapyd | |||
| 1 | +c | − | + |
| 1 | − | + (weak) | + |
| 12 | − | − | + |
| 1 | − | − | − |
a
Under same conditions as described in Table 2.
b
All samples with ≥10 colonies per plate.
c
All samples with 1 to 6 colonies per plate.
d
Sampled in May 1997 from fish receiving oxytetracycline treatment (21 days) in May and November 1996.